// Tutorial //

How To Create and Manage Databases in MySQL and MariaDB on a Cloud Server

Published on July 29, 2013
Default avatar
By Justin Ellingwood
Developer and author at DigitalOcean.
How To Create and Manage Databases in MySQL and MariaDB on a Cloud Server

What are MySQL and MariaDB?

MySQL and MariaDB are relational database management systems. These tools can be used on your VPS server to manage the data from many different programs. Both implement forms of the SQL querying language, and either can be used on a cloud server.

This guide will cover how to create a database using these tools. This is a fundamental skill needed to manage your data in an SQL environment. We will also cover several other aspects of database management.

For the purposes of this guide, we will be using an Ubuntu 12.04 server on a small droplet. However, everything should translate directly to other distributions.

How to Create a Database in MySQL and MariaDB

To begin, sign into MySQL or MariaDB with the following command:

mysql -u root -p

Enter the administrator password you set up during installation. You will be given a MySQL/MariaDB prompt.

We can now create a database by typing the following command:

CREATE DATABASE new_database;
Query OK, 1 row affected (0.00 sec)

To avoid errors in the event that the database name we've chosen already exists, use the following command:

CREATE DATABASE IF NOT EXISTS new_database;
Query OK, 1 row affected, 1 warning (0.01 sec)

The warning indicates that the database already existed and no new database was created.

If we leave the "IF NOT EXISTS" option off, and the database already exists, we will receive the following error:

ERROR 1007 (HY000): Can't create database 'other_database'; database exists

How to View Databases in MySQL and MariaDB

To view a list of the current databases that you have created, use the following command:

SHOW DATABASES;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| new_database       |
| other_database     |
| performance_schema |
+--------------------+
5 rows in set (0.00 sec)

The "information_schema", "performance_schema", and "mysql" databases are set up by default in most cases and should be left alone unless you know what you are doing.

How to Change Databases in MySQL and MariaDB

Any operations performed without explicitly specifying a database will be performed on the currently selected database.

Find out which database is currently selected with the following command:

SELECT database();
+------------+
| database() |
+------------+
| NULL       |
+------------+
1 row in set (0.01 sec)

We have received a result of "null". This means that no database is currently selected.

To select a database to use for subsequent operations, use the following command:

USE new_database;
Database changed

We can see that the database has been selected by re-issuing the command we ran previously:

SELECT database();
+--------------+
| database()   |
+--------------+
| new_database |
+--------------+
1 row in set (0.00 sec)

How to Delete a Database in MySQL and MariaDB

To delete a database in MySQL or MariaDB, use the following command:

DROP DATABASE new_database;
Query OK, 0 rows affected (0.00 sec)

This operation cannot be reversed! Make certain you wish to delete before pressing enter!

If this command is executed on a database that does not exist, the following error message will be given:

DROP DATABASE new_database;
ERROR 1008 (HY000): Can't drop database 'new_database'; database doesn't exist

To prevent this error, and ensure that the command executes successfully regardless of if the database exists, call it with the following syntax:

DROP DATABASE IF EXISTS new_database;
Query OK, 0 rows affected, 1 warning (0.00 sec)

The warning indicates that the database did not exist, but the command executes successfully anyways.

Conclusion

You now have the basic skills necessary to manage databases using MySQL and MariaDB. There are many things to learn, but you now have a good starting point to manage your databases.

If you'd like to learn about creating users and managing permissions in MySQL, see our guide on How To Create a New User and Grant Permissions in MySQL. Alternatively, to learn about tables in MySQL and MariaDB, click here.

By Justin Ellingwood

Want to learn more? Join the DigitalOcean Community!

Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in our Questions & Answers section, find tutorials and tools that will help you grow as a developer and scale your project or business, and subscribe to topics of interest.

Sign up
About the authors
Default avatar
Developer and author at DigitalOcean.

Still looking for an answer?

Was this helpful?

Great tutorials. I have managed to get mariadb installed and created a user and a database, but when I try to enter that information into an owncloud setup, I get a sql connection error. ???

@everest.deth: Your MySQL root password can be found in /etc/motd.tail:

cat /etc/motd.tail

Hi There,

I actually didn’t set up MySql myself, as I built the droplet with LAMP already on it. What would be my password?

I am new to cloud server…can anyone plz guide me how to upload my wordpress site in cloud server and create a database by using MySQL?

also, I don’t have ubuntu…can i go with XP?

Plz help…